 Here's an interesting pair of nebula in the Large Magellanic Cloud named the Cosmic Reef. They show how young, energetic, massive stars illuminate and sculpt their vicinity with powerful winds and searing ultraviolet radiation. The blue nebula at lower left, NGC 2020, has been created by a solitary mammoth star 200,000 times brighter than our sun. The blue gas was ejected by the star through a series of eruptive events during which it lost part of its outer envelope of material. The giant red nebula, 2014, on the upper right, has, at its center, a grouping of bright stars, each 10 to 20 times more massive than our sun. The star's ultraviolet radiation heats the surrounding dense gas and then unleash fierce winds of charged particles that blast away lower density gas, forming the bubble-like structure seen on the right. The star's powerful stellar winds are pushing gas and dust to the denser left side of the nebula, where it is piling up, creating a series of dark ridges bathed in sunlight.